Mold-ramming machine.



PATENTED MAY 8, 1906.

J. POULSON.

MOLD RAMMING MACHINE.

APPLICATION FILED JUNE 12, 1905.

4 SHEETS-SHEET 1.

if; -lg 4 ATTORNEYS No. 820,253. PATBNTED MAY B, 1906. J. POULSON.

MOLD lRAMMING MACHINE.

.1 PLIo.A.TIo'N FILED JUNI: 12. 1905.

4 SHEETS-SHEET 2.

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J. POULSON. MOLD RAMMING MACHINE.

APPLICATION FILED JUNE 12. 1905.

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PTBNTED MAY 8, 1906.

35 2 2f 3l ,manners I UNiTnn; 7sli-Arias Pai-ENT` ormon- MOLD-RAIVINIINGMACHINE.

Specification of Letters Patent.

Patented May 8, 1906.

Application ned June 12, 1905. serial No. 264,900.

To all whom, it may concern:

Beit known that I, JOSEPH PoULsoN, a citizen of the United States, and aresident of Phillipsburg, in the county of Warren and State of NewJersey, have invented a new and Improved Mold-Ramming Machine, of whichthe following is a full, clear, and exact description.

My invention relates to a machine for ramming molds, and while capableof use for molding in general'it is especially adapted for foundry-work,and particularly for that class of foundry-work in which verticalpipemolds are employed. It is adapted to ram` one such mold or a largernumber and is capable of use in making all kinds of molds of thischaracter.

One of the principal objects of the invention is to provide forreciprocating a series of rammers in such a manner that they will bepicked up by the reciprocating device and elevated to the desired heightand that when forced against the sand in the mold the rammers will beshortened, or, in other words, the distance between the lifting meansand the bits of the rammers will be decreased, so that as the sand risesin the mold the rammers will be in such condition that they will at alltimes give a strong blow upon the top of the sand and will ram the sandwith evenness throughout the length of the mold.

Further objects of the invention are to provide a yielding grippingdevice for assisting in the operation described above, to providevarious adjustments for the rammers in order to permit the ramming of aplurality of molds at different distances apart on the centers, toprovide for guiding the rammers, and to improve the form of the bits ofthe rammers, so that they may more efficiently pack the sand in themold.

Additional objects will appear below.

Reference is to be had to the accompanying drawings, forming a part ofthis specication, in which similar characters of reference indicatecorresponding parts in all the figan enlarged scale, of a grippingdevice constituting apart of the invention. Fig. 5 is a sectional viewon the line 5 5 of Fig, 3. Fig. 6 is a sectional view on the line 6 6 ofFig. 4, and Fig. 7 is a bottom view of a ramming-bit.

The machine is pivotally mounted upon a base 10, so that the arm 11,which supports most of the working parts, can swing about the base tothe desired position. On a bracket 12 is located a motor 13, connected,by means of gearing14, with a shaft 15. This shaft is provided withacrank 16. By means of a connecting-rod 17 the crank operates a slide 18to give it vertical reciprocation in ways 19 on the arm 11. Upon thisslide is rigidly mounted a plate 20, which I call the gripping plate.This plate is preferably in two or more parts, and these parts areadjustable in horizontal ways 21, secured to the slide 18. The parts ofthe gripping-plate are secured in any desired position on these ways bymeans of screws or bolts 22,passing through elongated slots 23 on theouter ways 21. The purpose of providing for this adjustment is to permitthe device to be used with different iiasks. The flasks with which thismachine is ordinarily used are in the form of vertical cylinders a, ofdifferent sizes, according to the diameter of the pipe to be molded.These flasks are usually set up in pairs, and it will be readilyunderstood that the larger the pipe to be molded the greater is thedistance between the centers of the two flasks, which are mounted uponthe same base b, and conse uently the plates 20 are adjusted toward anfrom each other in order that their centers may correspond with thecenters of the flask. `Although I have illustrated the device only asbeing used for double flasks, it will be readily understood that thesame principle is applicable when the iasks are put up in threes orlarger numbers.

The purpose of the gripping-plates is to support gripping devices 24 forholding rammers 25. These gripping devices are secured to thegripping-plates by means of bolts or screws 26, passing through radialelongated slots 27, so that they can be radially adjusted to any desiredposition in order that the rammers may enter the flasks at the properposition and form a circle about the pattern in the iiask. Each grippingdevice comprises a frame 28, having a top plate 29, provided with anopening 30 for the ram- ICO IIO

mer and for a clamping-bar 31. The rammer and clamping-bar also passthrough the slot 27 below. The clamping-bar is provided with a nose 32,adapted to rest upon the top plate 29 and hold it in position. It isalso provided with a pair of projections 33 having a space between themfor receiving a clamping member 34, which passes around the frame 28 andis provided with a spring 35 for forcing the-clamping member 31 againstthe rammer. A screw 36 is also provided for exerting pressure upon thespring 35 and regulating the tension with which the clamping-bar 31 isforced against the rammer. The clamping member 34 is provided with atooth 37, with which engages a tooth 38 upon a lever 39. This lever ispivoted upon the frame 28 and extends forwardly therefrom.

It is provided with a point 40, which is adapted to be engaged by aplate 41 for adjusting it. This point is preferably formed by the lowerend of a screw 42, mounted in the end of the lever and capable of beingturned so as to adjust the position of the point. The plate 41 ismounted upon a screw 43, which passes through the central portion of theplate 20. It will be undertsood that all these parts are duplicated uponthe other half of the plate. The plate 41 is adapted to engage all thepoints 40, one of which is connected with each gripping device, and itwill be seen that the raising of this plate will cause all of theprojections 38 to engage the projections 37 and force the clampingmembers 34 away from the rammers 25, so as to release them and allowthem to drop through the clamping devices, while the lowering of theplate 41 will reverse this operation and permit the springs 35 tooperate in the normalV manner and force the clamping-bars 31 against therammers, so as to hold them in position under the tension of the spring.

Upon the arm 11 are mounted brackets 44,

which support` a plate 45 directly over the plates 20. This plate isprovided with a pair of plates 46 having a series of radial slots 47 forreceiving a series of guide-tubes 48 for the rammers. These guide-tubesare capable of adjustment along the slots 47, so as to registe'r withthe rammers and guide them. Each tube is provided with a collar 49,having an arm 50, extending at an angle to the slot 47 in which the tubeis located. By means of these arms the tubes are adjusted in the slotsas desired. Each plate 46 is also provided with a series of slots 51 andis secured to the plate 45 by means of screws or bolts 52, passingthrough these slots and providing for adjustment of the plates 46. Therammers are provided with curved bits 53, having slanting lower surfaces54, and are so arranged as to perform a continuous ramming effect aroundthe pattern. The formation of the bits is such as to exert force bothsidewise and downward upon the blow being delivered, which provides fora thorough packing of the sand in the space between the flask and thepattern.

The operation of the machine is as follows: The flask or flaskscontaining the patterns are placed in position and the swinging armrevolved around the base until the rammingbars are in central positiondirectly over the flasks. lf there are two or more fiasks on one base,the plates 20 and 46 are so adjusted as to provide for the centering ofthe ramming-bars over each flask. It will be understood that during thistime the ramming-bars are held in elevated position by the force of theclamping-bars 31, applied by means of the springs 35. By tightening upthe screw 43 the plate or disk 41 engages all the points 40 on each halfof the grippingplate, and the levers 39 are lifted, so as to Vforce theclamping member 34 outwardly and release the ramming-bars. Theyconsequently drop to the bottom of the flasks. The screw 43 is thenloosened and the plate 41 lowered, so as to permit the spring to exert apressure upon the clamping-bar 31 and normally hold the ramming-bars onthe clamping-plates. Sand is then thrown into the top of the flask andfalls under the ramming-bars. The machine being started up, the plate 20is reciprocated, and upon its upward stroke it carries the ramming-barswith it on account of the force of the spring 35. On the downstroke alsoit carries the ramming-bars; but when they strike the sand they areallowed to slip between the frames 28 and clamping-bars 31 on account ofthe resiliency of the spring 35. They give a sharp blow to the sand,however, and ram it in an effective manner but on account of the slipcaused by the yielding of the spring they are shortened, or rather thebits are moved normally toward the clamping-plate, so that upon the nextstroke, more sand being admitted, they will not reach so far into themold.

It will be seen that by this construction the height of sand in the moldat the time when one stroke is delivered regulates the position of theramming-bits and provides for their giving a blow to any sand admittedafterward, vbut prevents the u per part of the mold being rammed har erthan the lower part, which would be the case if the stroke were the sameat all times. When the flask has been filled and the ramming-bars havebeen forced toits top, the flask can be removed and the machine swungaround to a position to ram other molds. The molds can be arranged in acircle around the machine and readily rammed one after another in thismanner.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. The combination of a frame, a clamp- IOO IIO

ing-bar thereon, a clamping member engaging said clamping-bar andadapted to force the same toward the frame, and means for regulating thepressure exerted by the clamping member on the bar.

2. The combination With a ramming-bar, of a gripping device, comprisinga frame, a clamping-bar mounted on said frame and adapted to engage theramming-bar, a

clamping member connected With said clamping-bar and means for forcingthe clamping member toward the clamping-bar.

3. The combination With a series of ramming-bars, of a series ofgripping devices each comprising a frame, a clamping-bar mounted on saidframe and adapted to engage a ramming bar, a clamping member connectedwith said clamping-bar, and resilient means for forcing said clampingmember toward the clamping-bar to secure the ramming-bar in positionupon the gripping device.

4. The combination of a frame, a clamping-bar mounted thereon, aclamping member engaging said clamping-bar and adapted to force ittoward the frame, a spring for operating said clamping member, means foradj usting the tension onsaid spring, and means for overcoming thetension of the spring.

5. The combination of a frame, a clamping-bar mounted thereon, aclamping member engaging said clamping-bar and adapted to force ittoward the frame, a spring for operating said clamping member, means foradjusting the tension on said spring, and means for overcoming thetension of the spring said last-named means comprising a pivoted leverhaving means for engaging said clamping member, and means for movingsaid lever.

6. The combination of a gripping plate having a series of perforationstherein for ramming-bars, a gripping device located adjacent to each ofsaid perforations, said gripping devices each comprising a clampingmember, a spring for operating said member, a projection on said member,a pivoted lever having a projection adapted to engage theiirst-mentioned projection and overcome the force of said spring, and anadjustable contact-point located upon said lever, With a screw mountedupon said gripping-plate, and a plate or disk on said screw in positionto engage all of said contact-points.

7. The combination of a gripping-plate having a perforation therein fora rammingbar, and a gripping device located adjacent to saidperforation; said gripping device cornprising a clamping member, aprojection on said member, a lever having a projection adapted to engagethe first-mentioned projection, a screw mounted upon the grippingplate,and a plate or disk on said screw in position to engage said lever.

8. The combination of a frame, a clamping-bar mounted thereon, aclamping member engaging said clamping-bar and adapted to force ittoward the frame, a lever having means for engaging the clamping member,and means for moving said lever to disengage the clamping meiilber fromsaid bar.

9. A molding-machine having a grippingplate in sections adjustabletoward and from each other, each section having means for supportingrammers.

10. The combination of a gripping-plate in sections adjustable towardand from each other, a series of gripping devices on each section forholding rammers, a series of guideplates mounted above saidgripping-plates, means for adjusting the guide-plates toward and fromeach other, and a series of guides mounted upon each guide-plate andadapted to register With the gripping devices.

1 1. The combination of a gripping-plate in sections adjustable towardand from each other, a series of gripping devices on each section forholding rammers, and means for adjusting the gripping devices toward andfrom each other.

" 12. The combination of a gripping-plate in sections adjustable towardand from each other, a series of gripping devices on each section forholding rammers, a series of guides for the rammers, and means foradjusting the guides toward and from each other.v

13. The combination of a gripping-plate in sections, means for adjustingsaid sections toward and from each other, a series of plates above saidsections, means for adjusting said last -named plates toward and fromeach other, and a series of guides located on said last-named plates.

14. The combination of a gripping-plate in sections adjustable towardand from each other, a series of gripping devices on each section forholding rammers, means for adjusting the gripping devices toward andfrom each other, a series of guide-plates mounted above saidgripping-plates, means for adjusting said guide-plates toward and fromeach other, and a series of guides mounted upon each guide-plate andadapted to register with the gripping devices, said guides beingradially adjustable upon the guide-plates.

15. The combination of a gripping-plate in sections adjustable towardand from each other, a series of gripping devices on each section forholding rammers, means for adjusting the gripping devices toward andfrom each other, a series of guide-plates mounted above saidgripping-plates, means for adjusting said guide-plates toward and Jfromeach other, a series of guides mounted upon each guideplate, and meansfor reciprocating the gripping-plates and rammers.

16. The combination of a gripping-plate in sections adjustable towardand from each other, a series of gripping devices on each section forholding rammers, means for adjusting the gripping devices toward andfrom each other, and a rammer connected With each IOO IOS

IIO

gripping device said rammers being arranged in a circle and each rammerhaving bits provided With slanting sides.

17. The combination of a gripping-plate in sections adjustable towardand from each other7 a series of gripping devices on each section forholding rammers, and a rammer connected with each gripping device; saidrammers being arranged in a circle.

18. The combination of a gripping-plate in sections adjustable towardand from each other7 a series of gripping devices on each section Jforholding rammers7 a series of guideplates mounted above saidgripping-plates, means for adjusting said guide-plates toward and fromeachother, a series of guides mounted upon each guide-plate, and meansfor reciprocating the gripping-plates and rammers.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

JOSEPH POULSON.

Witnesses JACOB S. STEWART, J. I. BLAIR REILEY.

